DAC02
Revision 1.10 Page of 2 Aug. 2010
2
below shows the difference among modules.
SET-A/EN SET-B/SET Module Type
LO LO/HI DRF1212D10
LO HI DRF4432D20
HI HI DRF7020D series, DRF7020M series
Table 2 Level Controls in Normal Communication Mode
1) For DRF1212 modules, the 3rd pin is SET-A and the 7th pin is SET-B. In normal communication
mode, the SET-A must be low and SET-B can be low/high (Normal mode/Wake-up mode). The USB
converter board uses IC CP2102 from Silicon labs and its RTS pin is corresponding to SET-A pin of
DRF1212 module. In order to test communication between modules successfully, users should
choose serial port software which provides RTS option and keep RTS selected so that the SET-A pin
is pull down and the DRF1212 modules will work in wake-up mode.
2) For DRF4432 modules, the 3rd pin is Enable pin and in normal work mode it must be set to low.
The 7th pin is Data/field strength indication pin. When it is sent to high, the module outputs normal
data or else it outputs field strength value. For the same reason, DRF4432 modules must be tested by
serial port software with RTS option.
3) As to DRF7020D/7020M series, the 3rd pin is Enable pin and in normal mode it must be set to
high. The 7th pin is SET pin and it is set to low when modules need to be configured. These series of
modules can work correctly when tested under common serial port software.
Dorji Applied Technologies
A division of Dorji Industrial Group Co., Ltd
Add.: Xinchenhuayuan 2, Dalangnanlu, Longhua,
Baoan district, Shenzhen, China 518109
Tel: 0086-755-28156122
Fax.: 0086-755-28156133
Web: http://www.rfmodule.me
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make corrections, modifications, improvements and
other changes to its products and services at any time
and to discontinue any product or service without
notice. Customers are expected to visit websites for
getting newest product information before placing
orders.
These products are not designed for use in life support
appliances, devices or other products where
malfunction of these products might result in personal
injury. Customers using these products in such
applications do so at their own risk and agree to fully
indemnify Dorji Industrial Group for any damages
resulting from improper use.
